Improvement in stereoscopes



L. D. SIBLEY.

Stereoemopes.

No. 141,822. PatenredAugusuLmn.

AM mom-umasMnH/c co. N. Wassomvs macsss 'thereby conning the same inposition.

NrrED STATES ATENT OFFICE.

LORENZO D. SIBLEY, OF CHICAGO, ILLINOIS.

IMPROVEMENT IN STEEOSCOPES.

Specification forming part of Letters Patent No. 141,822, dated August12, 1873; application iiled September 21, 1872.

To all whom it may concern:

Be it known that I, LORENZO D. SIBLEY, of Chicago, in the county of Cookand State of Illinois, have invented a new and Improved Stereoscope, ofwhich the following is a specication:

Figure l is a vertical transverse section of my invention. Fig. 2 is avertical longitudinal section of the saine, showing the lensesvertically above the box. Fig. 3 is a detail section transverselythrough the book.

Similar letters of reference indicate corresponding parts.

This invention relates to an improved stereoscopic instrument forholding a number of pictures in a book or folding rack. The inveny tionconsists, first, in such arrangement of the `book or picture holdingrack that the same,

although very compact when out of the instrument, will be properlyrotated to display the pictures successively, when in the box orinstrument, by a rotary toothed wheel placed in an inclined position inone end of the box, and engaging with loops or arms formed on the endsof the wires to which the pictures are secured. The invention alsoconsists in arranging metallic clasps so as to connect the pivotwiresand hold the pictures. The invention also consists in hinging the frameto the box, so that it can be vibrated from one side of the box to theother, as may be desired.

I shall now rst proceed to describe the book or picture holding rack.

The same consists of leaves A A, which are held at their inner ends bymetallic clasps a projecting from wires b, and hinged thereto. Theclasps aI have metal-band extensions d, that fold over the outer edgesof the leaves, The leaves can thus vibrate on the wires b. Each clasp ahinges not only to the wire under the leaf which it holds, but also tothe wire next adjoining, so that by this arrangement of connection theseveral wires are all united, and the several leaves A A constitute thecomplete book.

To the opposite sides of each leaf A of the book can be fastened thepictures to be displayed, said pictures being held in place by the metalbands d, which can easily be folded over, they being flexible.

lThe wires extend at one end of the book beyond the leaves, and formthere loops or arms e e, all of which are or may be connected by woventape, by which they will be held at the required angle apart when thebook is folded open. The outer leaves or covers of the book have attheir inner ends outwardly-projecting ears f f, which serve as supportsfor the book on the bottom of the containing-box B. This box B is madelarge enough to receive the book and to let the same be folded in themanner indicated in Fig. 1. In one end of the box is hung an inclinedshaft or button, C, with tooth-like ribs or lianges g at its inner end.When the book is put within the box the loops, or some of the loops, ofthe book will be between these teeth g, so that in turning the button Cthe leaves of the book will be turned successively in the same directionin which the button is revolved. Thus the leaves can be successivelydisplayed in the desired manner.

It must be here remarked that one or more vertical or inclined plates orledges, h h, pro ject from the ends of the box inwardly, to sup port thebook when it is folded, and to constitute a sort of pivot for the same,which will be clearly understood by reference to Fig. 1. In fact,without these ledges or plates h h, one or more, the book could not beoperated by the button C, nor be brought in reach with the teeth of thesame, the plates h h holding the book in position for such reach, andalso convenient for being folded from one side to the other, backward orforward.

The box B has on opposite sides openings for the inspection of thepictures. l) is the lens-frame, containing the stereoscopic lenses, ofordinary construction, and hinged to arms E E, that are pivoted to theends of the box.

In these pivoted arms the lens-frame can be swung to bring the lensesopposite either one of the openings in the sides of the box, so that thepictures on the opposite sides of the leaves vcan be observed throughthe same lens-frame by bringing the frame to the opposite sides of thebox. One of the openings in the box can be closed by a hinged lid,F,which is clearly shown in Fig. l. This lid can also be left open whentransparent pictures are to be inspected. rThe top and upper part of theends G ot' the box is made of ground glass, for the purpose of excludingthe dust and admitting the light. The outer part i of the lens-frame Dis, by X-levers H, connected to the inner part 7' of the same frame, andcan, by means lof said levers and by rack and pinion Z, be

bination with the loops or arms o of the wires d, as and for the purposespecified.

2. The clasps a, arranged as described, and each provided with armsattached to two contiguous Wires, d, whereby the series of Wires arehinged together and the pictures or cards supported, as set forth.

3. The lens-frame D, pivoted by arms E to the box or frame B, so that itcan be swung to either side, as set forth.

LORENZO D. SIBLEY.

Witnesses:

ADAM GRAHAM, JEFFERSON GRAHAM.

